1.

An oxy acid of phosphorus is a white deliquescent crystalline solid. It can be prepared by the hydrolysis of P_(2)O_(3) or PCl_(3) and its formula is :

Answer»

`H_(3)PO_(4)`
`H_(3)PO_(3)`
`H_(3)PO_(2)`
`H_(4)P_(2)O_(7)`.

SOLUTION :`PCl_(3)+H_(2)Prarr H_(3)PO_(3)+3HCL`
`P_(4)O_(6)+6H_(2)Orarr 4H_(3)PO_(3)`


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